Bureau of Energy Efficiency and Energy Conservation Building Code An Overview

Transcription

1 Bureau of Energy Efficiency and Energy Conservation Building Code An Overview Sanjay Seth Energy Economist Bureau of Energy Efficiency Government of India

2 Energy Conservation Act, 2001 Reduction of energy consumption using efficiency and conservation measures. Reduce the need to create new capacity thereby saving resources and green house gas emissions. Secure environmentally benign and sustainable growth Stimulate market transformation in favour of energy efficient products and appliances. Created Bureau of Energy Efficiency (BEE) as the nodal agency at the center and State Designated Agencies (SDAs) at the state level to implement the Act.

3 Bureau of Energy Efficiency (BEE) BEE was set up in March 2002 under the provisions of Energy Conservation Act of 2001 to provide a legal framework for the government s energy efficiency initiatives in the country. The Bureau s mission is to develop policies and strategies with a thrust on self regulation and market principles with the primary objective of reducing energy intensity of the Indian economy.

4 Bureau of Energy Efficiency (BEE) Develop and recommend to the Central Government norms for processes and energy conservation standards Develop and recommend minimum energy performance standards and labeling design for equipment and appliances Develop and recommend specific energy conservation building codes Recommend notifying any user or class of users of energy as designated consumers Take necessary measures to create awareness and disseminate information for efficient use of energy and its conservation

5 Agriculture 30.7% Transportation 2.8% Residential 23.4% Commercial 6.6% Industrial 36.5% Sectorial Energy Consumption

6 Energy Consumption in the Commercial and Residential Buildings Others 8% Ot hers 10 % TV 4% Light ing 28% HVAC 32% Lighting 60% Ref rigerat ion 13 % EV Cooler 4% A/C 7% Fans 34% Commercial buildings 33 billion units Residential buildings 116 billion units

7 Building in EC Act 2001 Building means any structure or erection or part of a structure or erection, after the rules relating to energy conservation building codes have been notified under clause (a) of section 15 or clause (l) of sub-section (2) of section 56, which is having a connected load of 500 kw or contract demand of 600 kva and above and is intended to be used for commercial purpose

8 ENERGY CONSERVATION BUILDING CODE [ECBC] Bureau of Energy Efficiency Government of India

9 Electricity Use in the Commercial Sector is increasing!

10 Background : ECBC Comply with energy consumption norms and standards and/or to prepare and implement schemes for its efficient use and conservation. Prescribe energy conservation building codes for its use/conservation in commercial buildings State Governments to amend building codes to suit regional and local climatic conditions. Direct owners or occupiers of commercial buildings to comply with provisions of building codes.

11 What are Energy Conservation Building Codes? ECBC set minimum energy efficiency standards for design and construction ECBC encourage energy efficient design or retrofit of buildings so that It does not constrain the building function, comfort, health, or the productivity of the occupants Has appropriate regard for economic considerations (life cycle costs i.e. construction + energy costs are minimized)

12 ECBC Provisions in the EC Act 2001 BEE would take suitable steps to prescribe guidelines for energy conservation building codes Central Government can prescribe energy conservation building codes, and direct owners/occupiers to comply with them State Government can modify the code in response to local climate conditions.

13 ECBC Development Approach Broad Stakeholder participation Building Industry, Manufacturers, Professionals, Govt. Agencies etc. Addresses local design conditions and construction practices Emphasis on maximizing building envelope benefits to encourage better designs First generation code ease of use is a priority Both in terms of code requirements and language

14 ECBC development Process An extensive data collection was carried out for construction types and materials, glass types, insulation materials, lighting and HVAC equipment Base case simulation models were developed The stringency analysis was done through detailed energy and life cycle cost analysis. A stringency level for each code component was established Code was finalized after consideration of comments on a draft version. Launched by Hon ble Minister for Power on 27 th May 2007

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16 ECBC Scope Mandatory Scope Covers commercial buildings Applies to New Construction only Building components included Building Envelope (Walls, Roofs, Windows) Lighting (Indoor and Outdoor) Heating Ventilation and Air Conditioning (HVAC) System Solar Water Heating and Pumping Electrical Systems (Power Factor, Transformers)

17 Addressing Climate Zones Variations 1. Five climate zones 2. Composite (Delhi) 3. Hot Dry (Ahmadabad) 4. Hot Humid (Kolkata), 5. Moderate (Bangalore) 6. Cold (Shillong)

18 ECBC Compliance Approaches Component-based (prescriptive) requires little energy expertise; provides minimum performance requirements; no flexibility System-based (trade-off) allows some flexibility through the balance of some high efficiency components with other lower efficiency components Whole building design analysis (performance) allows flexibility in meeting or exceeding energy efficiency requirements (as compared to a baseline building)

19 Building Envelope Design ECBC Compliant Design Strategy for a Building Heat/Moisture Losses Walls Roof Window Minimize Conduction Losses Use insulation with low U-value Use insulation with low U-value Use material with low U-factor Minimize Convection Losses & Moisture Penetration Reduce air leakage & use vapor barrier Reduce air leakage & use vapor barrier Use prefabricated windows and seal the joints between windows and walls. Minimize Radiation Losses Use light colored coating with high reflectance Use light colored coating with high reflectance Use glazing with low Solar Heat Gain Coefficient (SHGC)

20 ECBC Impact Case Studies

21 Building envelope Cavity wall with insulation Insulated and shaded roof Double glazing and shading for windows Lighting system Efficient fixtures Efficient lamps Daylight integration Average LPD < 1 W/ft 2 HVAC system Load calculation with optimized envelope and lighting system Efficient chillers Efficient condenser cooling Use of geothermal energy for cooling Case study 1 : CESE, IIT Kanpur

22 Case study 1 : CESE, IIT Kanpur Base building EPI = 240 kwh/m 2 per annum Envelope optimisation EPI = 208 kwh/m 2 per annum Lighting optimisation EPI = 168 kwh/m 2 per annum HVAC optimisation EPI = 133 kwh/m 2 per annum Controls ECBC compliant building EPI = 98 kwh/m 2 per annum

23 Case study 2: Fortis Hospital Proposed at Shalimarbagh, New Delhi Initial energy consumption: 605 kwh/m2 yr Building envelope AAC blocks Insulated roof Double glazing and shading for windows

24 Case study 2: Fortis Hospital Lighting system Efficient fixtures Efficient lamps Daylight integration Load reduction of 33% HVAC system Load calculation with optimized envelope and lighting system Efficient chillers Efficient fans for AHUs Use of VFDs

25 Case study 2 : Fortis Hospital Base building EPI = 605 kwh/m 2 per annum Envelope optimisation EPI = 593 kwh/m 2 per annum Lighting optimisation EPI = 476 kwh/m 2 per annum Efficient chiller EPI = 346 kwh/m 2 per annum Controls for HVAC system ECBC compliant Fortis building, New Delhi EPI = 312 kwh/m 2 per annum

26 Case study 3: Triburg office Base building EPI = 186 kwh/m 2 per annum Envelope optimisation EPI = 165 kwh/m 2 per annum Lighting optimisation EPI = 120 kwh/m 2 per annum HVAC optimisation EPI = 98 kwh/m 2 per annum HVAC controls EPI = 92 kwh/m 2 per annum ECBC compliant Triburg building, Gurgaon EPI = 86 kwh/m 2 per annum Daylight integration

27 Environmentally Sensitive Design Makes Sense Energy savings are of the order of 50% Initial cost increases by 10 to 15%, but payback is obtained in 5 to 7 years The most cost effective way to meet the ECBC requirement is to design buildings with appropriate regard to climate and sun. A design not sensitive to sun and climate will have to invest more to meet the minimum ECBC standard

28 National Impact Potential The average energy use (lighting and HVAC) for typical commercial building is 200 kwh/sq. meter/year. Mandatory enforcement of ECBC shall easily reduce the energy use by 30-40% to kwh/sq. meter/year. Nationwide Mandatory enforcement of ECBC would yield a saving of 1.7 billion kwh for

29 Impact of Energy Codes Market Development for EE products Building Insulation Energy Efficient Windows (Glass and Frames) High-Efficiency HVAC Equipment Improved Design Practices Lighting and Day-lighting Natural Ventilation/Free-Cooling Systems Lower Energy Use and Reduced Electricity Bills Reduced connected load and Improved Power Factor

30 Typical Implementation Schedule Years Phases Development 2 Implementation Preparation 3 Enforcement 4 Revisions

31 Proposed Scheme for Mandatory ECBC Enforcement Implementation of ECBC Government buildings enforced by agency Private & Institutional buildings enforced via local code process and certified by independent accredited agencies Market programs Green Building Rating Systems Energy Use Certification & Labeling Schemes

32 ECBC Development: Next Steps Market Development Design support through Voluntary ECBC-compliant Building Program DSM Programs (Design Assistance / Rebates) Green Building Rating Systems Energy Use Certification & Labeling Scheme Capacity Building Checking and Certification Systems for Equipment and Systems Capacity building of State and Municipal implementing agencies Accreditation, training and monitoring of certification agencies Design Manuals, Software, and Training and Technical support for Architects, Engineers, and Code Officials Awareness programs for building owners, designers, and users

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